programme = {'append': '列表末尾添加元素',
             'insert': '列表中插入元素',
             'del': '列表中删除元素',
             'sort': '列表进行永久性排序',
             'sortde': '列表进行临时排序',
             'len': '列表长度'}
print("append:\n"+programme['append']+"\n")
print("insert:\n"+programme['insert']+"\n")
print("del:\n"+programme['del']+"\n")
print("sort:\n"+programme['sort']+"\n")
print("sortde:\n"+programme['sortde']+"\n")
print("len:\n"+programme['len']+"\n")